I wouldn't think Stranded vs. Solid would be a significate issue - but who knows!

Also, the reference to increased Common Grounded Conductor size makes sense, but increased size of the EGC regarding Harmonics doesn't make sense - it's not normally carrying Currents!
If it is, something is - a - wrong - a. [Linked Image]

More later.

Scott35

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!